Can calls to non-blocking SSL_read() and SSL_write() be interleaved?
I'm doing select() / event driven IO, and using a BIO pair to handle the
underlying socket IO myself.
A typical sequence might be:
SSL_read(ssl, read_buf, read_size); /* returns e.g. SSL_ERROR_WANT_READ */
select();
/* woken up by an unrelated event which triggers: */
SSL_write(ssl, write_buf, write_size);
/* which causes data to be appended to the BIO slave,
then returns SSL_ERROR_NONE. We read the data from BIO master
and schedule it to be writtenl then: */
select();
/* data available; read() and append to BIO master, then: */
SSL_read(ssl, read_buf, read_size); /* returns SSL_ERROR_NONE */
select();
Is that call to SSL_write() legitimate while the SSL_read() isn't finished?
--
Any [programming] language that doesn't occasionally surprise the
novice will pay for it by continually surprising the expert.
-- Larry Wall
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